Ventilator for containers



FIG. 1 is a bottom perspective view of a ventilator for containers showing our new design;

FIG. 2 is an end elevation thereof, the opposite end being plain and unornamented;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a side elevation thereof, the opposite side being identical in appearance; and

FIG. 5 is a top plan view thereof. 

The ornamental design for a ventilator for containers, as shown and described. 